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Goodwill and Identified Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2012
Summary of Goodwill and Identified Intangible Assets | The following is a summary of identified intangible assets (in thousands):
|  | December 31, 2012 |  |  | December 31, 2011 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Identifiable intangibles: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed core technology |  | $ | 136,145 |  |  | $ | (102,449 | ) |  | $ | 33,696 |  |  | $ | 136,145 |  |  | $ | (81,951 | ) |  | $ | 54,194 |
Customer relationships/contracts |  |  | 67,098 |  |  |  | (48,150 | ) |  |  | 18,948 |  |  |  | 67,098 |  |  |  | (42,142 | ) |  |  | 24,956 |
Trademarks and tradenames |  |  | 11,361 |  |  |  | (9,145 | ) |  |  | 2,216 |  |  |  | 11,361 |  |  |  | (7,700 | ) |  |  | 3,661 |
Maintenance agreements and related relationships |  |  | 7,100 |  |  |  | (3,513 | ) |  |  | 3,587 |  |  |  | 7,100 |  |  |  | (2,260 | ) |  |  | 4,840 |
Total identifiable intangibles |  | $ | 221,704 |  |  | $ | (163,257 | ) |  | $ | 58,447 |  |  | $ | 221,704 |  |  | $ | (134,053 | ) |  | $ | 87,651 |
Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill for the years ended December 31, 2012 and 2011 are as follows (in thousands):
|  | December 31, |
|  | 2012 |  |  | 2011 |
Balance at beginning of period |  | $ | 212,417 |  |  | $ | 211,878 |
Adjustment to deferred tax liability associated with the acquisition of Omneon |  |  | — |  |  |  | (527 | )
Adjustment to fixed assets associated with the acquisition of Omneon |  |  | — |  |  |  | 298 |
Adjustment to income tax payable associated with the acquisition of Omneon |  |  | — |  |  |  | 771 |
Foreign currency translation adjustment |  |  | 101 |  |  |  | (3 | )
Total changes in goodwill |  | $ | 212,518 |  |  | $ | 212,417 |
Estimated Future Amortization Expense of Purchased Intangible Assets | The estimated future amortization expense of purchased intangible assets with definite lives is as follows (in thousands):
|  | Cost of Revenue |  |  | Operating Expenses |  |  | Total |
Year ended December 31, |  |  |  |  |  |  |  |  |  |  |  |
2013 |  | $ | 19,232 |  |  | $ | 8,096 |  |  | $ | 27,328 |
2014 |  |  | 13,745 |  |  |  | 6,775 |  |  |  | 20,520 |
2105 |  |  | 719 |  |  |  | 5,783 |  |  |  | 6,502 |
2016 |  |  | — |  |  |  | 4,097 |  |  |  | 4,097 |
2017 |  |  | — |  |  |  | — |  |  |  | — |
Total future amortization expense |  | $ | 33,696 |  |  | $ | 24,751 |  |  | $ | 58,447 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 47 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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